Motor plow



0. PFANHAUSER.

MoToR PLow.

APPLICATION FILED JUNE 10| I9I8.

Patented Jah. 3, 1922.

3 SHEETS-SHEET I.

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||q||II|aI IIII IIIIIIIIII I l I II I IIullIIlllll IIIIIIIIIJIII-IIII|I 0. PFANHAUSER.

MOTOR PLOW.

APPLICATION FILED JUNE I0, 1918.

Patented Jan. 3, 1922.

3 SHEETS-SHEET 2- 0. PFANHAUSER.

MOTOR PLOW. APPLICATION FILED JUNE 1Q, l918 Patented J an. 3|, 1922.

3 SHEETS-SHEET 3 g l A lmmlm EZ, u n

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pira s'ra'rsfs or'ro rFANHAUsER, or lVIENNA, AUSTRIA.

Moron amaai-8.

To all whom t may concern.'

v Be it known that I, G'rro PFANHAUSER, a

subject of the Emperor of Austria, residing at Vienna, in the Province of Lower Austria ,and Empire of Austria, have invented a new This invention relates to motor plows of the suspended shares type, in which the auxiliary frame carrying the soil working tools is so connectedV with the main frame that it canbe lowered andraised, and in which one of the driving wheels can also be lowered and raised and these displacements coincide with a corresponding movement of the frame carrying the tools.

The invention has for its purpose to provide a plow of this kind having two driving wheels at the front end and a steering wheel at the rearl end andin which the depth at which the shares enter the soil exclusively depends on the position given to the furrow wheel, while the land wheel running upon the soil not yet worked and the steering wheel at rear are mounted to the main frame in unalterable positions. To this end, the share frame is suspended fromV the main frame by means of links, and at the rate the furrow wheel is raised or lowered, the share frame also rises or. sinks while always keepi ing parallel position to theA main frame.

The pivoted. arm. 4carrying the furrow wheel and the share vframe are so connected togetherby means of two toothed sectors in gearv or by a system of levers and linksthat thepressure caused bythe resistance against the advance of the furrow wheel and the weight of the share framev balance each other without the aid ofsprings or counterpoises and that the depth at which the shares enter the soil corresponds tothe height to which the furrow wheel is adjusted.

- With that, the transmitting mechanism connecting the furrow wheel with the-*share frame is so constructed that when the furrow wheel is raised to the level of the land wheel, theshare frame advances at the end of this movement to the effect that when the furrow wheel has reached its topmost pQS* Specification of Iettersatent.

ferred to.

PLOW.

`Patented J an. `3, 1922.

Application iled .Tune 10, 1918. Serial No. 239,300. j

tion, the said frame is no longer at the level of the lowermost portion of the wheel but at a certain distance above the ground, for

enabling the plow to travel on roads.

In order to prevent destructive action the furrow wheel and the share frame by the variations of the resistances met by the said wheel and the shares, the drivin@ member of this mechanism is adapted to slide between upon the transmitting `mechanism between Y two springs and its displacements are utii lized for governing the output of the engine and for adjusting the positionsof thev furrow wheel and of the 'share frame.

The drawingsshow a form of embodiment of a motor plow constructed according to i the invention. In the drawings, Fig. l isa side elevation of the plow in working position and Fig. 2 a side elevation of the same in travelling position. F ig. 3 is atop view of the plow. `F ig. f1 is a diagram of the positions of the transmitting levers. Figs.

- 5 and 6 show in side elevation and plan, re-

spectively, a motor plow provided with the sliding driving member hereinbefore re- Like any motor plow with suspended shares, the plow in question is a threewheeled car, in which the two larger front wheels, l and 2, are driving wheels, while the smaller wheel 3 at the rear is the steering wheel, carried by an upright trunnion 4 and adapted to be adjusted by any suitable mechanism, forinstance by a mechanismto be acted upon by the hand wheel 5. The motor plow comprises a main frame 6 and a share frame 7. The front end of the main frame carries the engine, which, in the well-known manner, actuates the driving wheels 1 and 2 by means of a change speed gear 9, bevel gear 10 (see Fig. 3)v and spur wheelslly and 12. While the pivot ofthe 'driving wheel 1 is secured tothe frame 6, the pivot ofthe driving wheel 2 is carried by an arm 13 adapted to swing` around the secondary shaftVv 14C. y

By means of a tube 15 loosely surrounding the shaft 14, the arm 13 is rigidly connected with the toothed sector 16, which can be turned in either direction by the worm 17, the bevel gear V18 and the reversing gear 19. The reversing gear 19'is operated from the drivers seat 21 by means of the rod 20 and the pedal 22.

Besides that, the toothed sector 16 is kin gear with the toothed sector 23 keyed upon the shaft 24 carried by the main frame` 6 andconnected with'the share frame 7 by arms 25. TheV share frame 7 is of triangu-` lar shape like the rear portion of the main frame 6, andas Vit 1s suspended by means of Y able system of leversand links.

It will be seen from the foregoing state- A -ments thatone iszenabled to push forward,

from the driversfseat 21, by'means of the Vpedal 22 or in similar way the rod 20, Vwhich has for its effectv that the reversing gear 19 causes, by means of the bevel wheels 18 and theworni 17 the Vtoothed sector 16 to turn in either directionand the pivoted arm 13 to rise or to lower. Thusv this lever arm raises .or lowers the furrow wheel 2. At the same time, the toothed vsector 23v and the lever arms 25 cause to raise or to lower the share frame 7 to which the shares or other tools are secured inthe usual manner.

Fig. 1 shows the shares in their. working position, that is to saysunk into theisoil to a certain depth and with their edges at thel same level asfthe lowermost portion ,of the furrow wheel 2. In Fig. 2, the shareframe .7 is shown in its uppermost position', corresponding` to the furrow wheel being raised `to the level of the land wheel and vready Vfor travel on roads, while the' edges ofthe soil working tools 27 are located at a certain dise weight.

tance a above the can not touch it. K y

The reaction of the ground in the furrow tends to raise thelever arm 13 and the share frame 7 is drawn downward. b-y Y itsV own Now, as the two lever arms 13 and 25 which would be displaced under the action of these forces, are connected together by the toothed sectors 16 and 23, the reaction pressure acting upon the arm 13 and the ground and consequently weight of thek share frame acting upon the Varms 25 counterbalance each other and the use of springs or counterpoises for this pura 'poses is dispensed with.

The diagramV Fig. 4 shows the relative positions of the arm 13 and the arms 25, the lowermost positions being drawn in full and the topmost positions inrdash lines 13', 25. For the sake 0f easier explanation, the medium positions are also drawn in dot and dash lines. For passing from the lowermost position to the uppermost one '13', the arm 13 has run through the vertical space m and at the same time, the arms 25 have passed from the lowermost to the uppermost position 25 by running through a vertical space al Y Owing to the different positions of the angles 13-13 and 25--275 toward the vertical, the .height lnis bythe length '0 more 1 ,ceases L direction bythe arms 25 is only longerthan the vertical space p coveredby the arm 13 by the insignificant llength 'r whichdoes not play any .part in practice.

In the Figs.` 5 and 6, thereis movable driving `part of the transmitting gear connecting the furrow wheel with the share frame. Owing to this particular arrangement of thedriving part, the increase beyond a certain limit of the resistance aga-inst the advance of the sharesin the soil hasfor its effect the automatic raising of the vsha-re frame' and the furrow wheel up to the moment when the resistance decreases again, and in this manner damage tothe plow lis avoided. It has-already beenproposed to interpose, into the adjusting mechanisms of the shares, springs which are put under tension by the resistance against the advance of the share. but this arrangement merely acts against thisV resistance and only provides elastically yielding seats' for the shares. Diiiering from this, the" springs which-according to this invention arezput under tension by the movable driving part, are

shown the which also'carries the shaft 24 of the lever arms 25 and through which passes thev shaft 30 of the worm 17'. .This pillow-block 28 is rigidly bolted to the mainframeA 6. The shaft-3l0v of the worm is adapted to slide lengthwise and the worm is keyed to it. The

resistance against the advance of the sharesV 29 are more or lessl compress'edineither-direction, as Athe wormshaft 30 is displaced under the action of these resistances. The displacements are utilized for automatically adapting the working depth-of the' shares to lVhen the pressure upon the springsv 29 Vini creases, the-lever 3l opens thel throttle valve 33 and afterwards it also operates'the reversing gearl9 in order to raise the share frame 7 `and the furrow wheel2 to. such a height that the pressure onthe springs isidiminished. When this arrives, the lever 31y `disengages the reversing gear and at the same time it gives to thethrottle valve 3,3 the position Vwith' which the `quantity of Vfuel is adapted to the desired output of the engine. It has already been proposed automatically to govern,according to the resistance of the soil, the output of engines of motor plows and consequentlyv the invention is` limited to the combination with a worm shaft adapted to slide lengthwise of the Vthrottle valve.

Every time the product of the resistance l against the advance of the shares and against the rollingof the furrowwheel sinks below: a given minimum, the endwise displacement of the shaft 30 in the `opposite direction and the angular movement ofthe lever 3l thereby caused have forvtheir effect that the feeding offuel totheengine is throttled vand that, on the other hand, the reversing gearx19, engaged for the rotation of the worml in the opposite direction causes the shares 27 moredeeply to enter the soil, until the product of the resistances against the rolling of the furrow wheel' and against the advance of the shares Vcorresponds to the tension of the springs 29.

The two springs 29 arranged as hereinbefore described also prevent Lruptures of vthe machine and injuries tothe shares and to the frame. Indeed, if the shares hit in the soil against an obstacle of extraordinary resistance, for instance against va stone-block, they share frame 7 is raised .in the described manner sufficiently high for allowing the shares 27 to pass above the obstacle.

I claim: y

l. In a motor plow, the combination with the main frame and the .engine carried therebyof` ajlever arm pivoted to the main frame, a driving wheel carried by the said lever arm, a share frame suspended from the main frame by means of links, transmitting mechanism interposed between the sai lever arm and one of the links and means for so gearing the-said mechanism with the engine as to be driven in either direction.

2. In a motor plow1 the combination with the main frame and the engine carried thereby of a lever arm pivoted to the main frame, a driving wheel carried by the said lever arm, a share frame suspended from the main frame by means of links, a toothed sector rigidly connected with the'nave of the springs lever arm, another toothed sector meshing with the said sector and rigidly connected with-the nave of one of the links, a worm in gear with one of said sectors, a reversing gear mounted on the driving shaft ,of the engine and transmitting connection between the said reversing gear and the worm shaft. 3. In a motor plow, the combination with the main frame and the engine carried thereby of a lever arm pivoted to the main frame, a driving wheel carried by thesaid lever arm, a share frame suspended from the main frame by means of links', a toothed sector rigidly connected with the nave of the lever arm, another toothed sector meshing 'ith the said sector and rigidly connected with the nave of one of the links and means forangularly displacing one of ysaid sectors, the axis 0f the link sector being located at a lower level than the axis of the-lever sector and the path of the link-sector in the upright portion of the circle, while the` path of the' lever sector comprises the -lower portion of the circle, for the purpose of enabling the share frame to be raised more highly than the furrow wheel, y f

4. In a motor plow` the combination with the main frame and the engine carried thereby of a lever arm pivoted to the main frame, a drivng wheel carried by the said vlever arm, a share frame suspended from the 4main frame by means 0f links, l Vtransmitting mechanism interposed between the said lever arm and one of the links, -means for so gearing the said mechanism with the engine as to be driven in either direction andl two bearing in opposite directions against a part of the mechanism adapted to displace itself in a corresponding direction wlien'tlie mechanism is operated.

5.` In a motor plow, the combination with the main frame and the engine carried thereby of a lever arm pivoted to the main frame, a driving wheel carried by the said lever arm, a share frame suspended from the main frame by means of links, a toothed sector rigidlyV connected with the nave of the lever arm, another toothed sector meshing with the said sector and rigidly connected with the nave of one of thelinks, a worm in gear with one of said sectors and keyed to an endwise movable shaft, a reversing gear mountedon the driving shaft of the engine,`

transmitting gear between the said 'reversing gear and the endwise movable shaft and two springs adapted to oppose the displacements of the shaft. c

`6. In a motor plow, the combination with the main frame and the engine carried thereby of a lever arm pivoted to the main frame, a driving wheel carried by the said vlever arm, a share frame suspended from the mainv frame by means of links, transmitting mechanism interposed between the said lever arm and one of the links, means for so gearing soy ` bycf a lever arm pivoted to the mainframe,

the said mechanism withthe engine as to be dri venin` eitherldirection, two .springs bearing 1n opposite directions against a part of the' mechanism adapted to displace itself Vin a corresponding direction when therinechanism is operated VVand transinitting mechamsm yconnecting the said part with the throttle valve of the engine. if A l7. ln a motor plow, the combination .vith the main frame and the engine carried thereadriving wheel carried by the said lever arm, a 'share frame-suspended from the main frame by means of links, transmitting mechanism interposed' between the said lever arm and one of the linka-means comprising a reversing gear for gearing the said mechanism withthe driving shaft of the engine,

two springs bearing in opposite directions against a part ofthe mechanism adapted to displace itself in ja corresponding direction when themechanism is operated and transmitting mechanism connecting the said par versing gear for gearing the said mechanism with the driving shaft of the engine, two springs bearing in opposite directions against a part ofthe mechanism adapted to displace itself in a corresponding direc-tion when the mechanism is operated and transmitting mechanism connecting the said part with the said reversing gear and with the f throttle valve lof the engine.

9. In a motor plow, the combination with Vthe main frame and the engine carried thereby of a lever arm pivoted to the Ina-in frame, a driving wheel carried by the said lever arm, a share frame suspended from the main frame by means of links, a toothed sector rigidly connected with the nave of the lever arm, another toothed sector meshing withv ythe said sector and rigidly connected with the nave of one of the links, a worm in gear with one of said sectorsafnd keyed to an' end- Vwise movable shaft,.a reversing gear mountshaft, aV lever hinged tothe'front end of the p endwise movable shaft and a rod connecting lthe lever tothe throttle valvelever.-

10. Ina motor plow',ithe combinationwith the main frame' and the enginecarriedthereby of a lever' arm pivoted to theV main frame, a `driving wheel carried by the-'said lever arm', a shareframe suspended 'from the'main frame by means of links, a toothed sector rigidly connected with the nave ofthe lever arm, another toothed sector meshing with the said sector and rigidly connected with the'nave of one of the links, a worm in g 1 with either sector andkeyed to an e'ndwise movable shaft, a reversing gear mounted on the driving shaft of the engine, transmitting gear between the said traversing gear and the endwise movable shaft, two springs adapted'to oppose the displacements of the shaft, and a two-armed lever having one end hinged tothe frontend ofthe endwise movable shaft and the other end to the adjusting rod of the reversing gear.- i Y `1,1. In a motor plow, the combination with the main frame and the engine carried thereby of a lever armpivoted to the main frame, a driving wheel carried byv the said lever arm, a share frame suspended from the main frame by means of links, a toot-hed sector rigidly connected with the nave of the lever arm, another toothed sector meshing with the said sector` and rigidly connected with the'nave of one of the links, a worm in gear with either sector and keyed to an endwise movable shaft, a reversing gearimounted on the driving shaft of the engine, transmitting gear between the said reversing gear and the endwise movable shaft, two springs adapted to oppose the displacements of the shaft, avtwo-armed lever having one end hinged-to the front end of the worm V,shaft and the other end to the adjusting rod of the reversing gear and a rod connecting this lever with the throttle valve lever.

OTTO PFANHAUSER 

